Not a clean label ingredient

BST (Bovine somatotropin)

Also known as: Bovine Somatotropin, BST, BGH, bovine growth hormone

BST (Bovine somatotropin) also known as Bovine growth hormone (BGH) is an artificial growth hormone. It is a peptide hormone produced by cows’ pituitary glands. Like other hormones, it is produced in small quantities and is used in regulating metabolic processes.